1. Department of Oncology, Haematology and Bone Marrow Transplantation with Section of Pneumology University Medical Centre Hamburg‐Eppendorf Hamburg Germany
2. Department of Obstetrics and Fetal Medicine University Medical Centre Hamburg‐Eppendorf Hamburg Germany
3. Division of Neonatology and Paediatric Intensive Care University Children's Hospital University Medical Centre Hamburg‐Eppendorf Hamburg Germany